Changed 8 bit images to use DIB_PAL_COLORS. Also changed it so that

8-bit images aren't dithered to the color cube on a true color device
This commit is contained in:
troy%netscape.com 1998-08-05 15:51:31 +00:00
Родитель 6a705d8fa5
Коммит fa89de6686
3 изменённых файлов: 99 добавлений и 270 удалений

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@ -103,6 +103,18 @@ ImageRendererImpl::NewPixmap(void* aDisplayContext,
depth = 24;
}
// XXX When the other platforms implement GetDepth() then remove the
// XP_WIN ifdef
#ifdef XP_WIN
PRUint32 deviceDepth;
dc->GetDepth(deviceDepth);
if ((8 == depth) && (deviceDepth > (PRUint32)depth)) {
// Don't force dithering to the color cube...
depth = 24;
}
#endif
img->Init(aWidth, aHeight, depth,
(aMask == nsnull) ? nsMaskRequirements_kNoMask :
nsMaskRequirements_kNeeds1Bit);
@ -126,10 +138,19 @@ ImageRendererImpl::NewPixmap(void* aDisplayContext,
aMask->header.height = aHeight;
}
if (aImage->header.color_space->pixmap_depth == 8) {
if (8 == depth) {
IL_ColorMap *cmap;
if (sPseudoColorSpace == nsnull) {
#ifdef XP_WIN
// This needs to match the logical palette
// XXX Clean this up to use the one and only color space
// the device manager should hold...
IL_RGB reserved[10];
memset(reserved, 0, sizeof(reserved));
cmap = IL_NewCubeColorMap(reserved, 10, 216 + 10);
#else
cmap = IL_NewCubeColorMap(nsnull, 0, 216);
#endif
if (cmap != nsnull) {
sPseudoColorSpace = IL_CreatePseudoColorSpace(cmap, 8, 8);

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@ -27,9 +27,9 @@ IsWindowsNT()
{
OSVERSIONINFO versionInfo;
versionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
versionInfo.dwOSVersionInfoSize = sizeof(versionInfo);
::GetVersionEx(&versionInfo);
return versionInfo.dwPlatformId == VER_PLATFORM_WIN32_NT;
return VER_PLATFORM_WIN32_NT == versionInfo.dwPlatformId;
}
PRBool nsImageWin::gIsWinNT = IsWindowsNT();
@ -43,7 +43,6 @@ nsImageWin :: nsImageWin()
mImageBits = nsnull;
mHBitmap = nsnull;
mAlphaHBitmap = nsnull;
mHPalette = nsnull;
mAlphaBits = nsnull;
mColorMap = nsnull;
mBHead = nsnull;
@ -66,31 +65,65 @@ nsresult nsImageWin :: Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth,nsMa
{
mHBitmap = nsnull;
mAlphaHBitmap = nsnull;
mHPalette = nsnull;
CleanUp(PR_TRUE);
ComputePaletteSize(aDepth);
if (mNumPalleteColors >= 0)
if (8 == aDepth) {
mNumPaletteColors = 256;
mNumBytesPixel = 1;
} else if (24 == aDepth) {
mNumPaletteColors = 0;
mNumBytesPixel = 3;
} else {
NS_ASSERTION(PR_FALSE, "unexpected image depth");
return NS_ERROR_UNEXPECTED;
}
if (mNumPaletteColors >= 0)
{
mBHead = (LPBITMAPINFOHEADER) new char[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * mNumPalleteColors];
// If we have a palette
if (0 == mNumPaletteColors) {
// space for the header only (no color table)
mBHead = (LPBITMAPINFOHEADER)new char[sizeof(BITMAPINFO)];
} else {
// Space for the header and the palette. Since we'll be using DIB_PAL_COLORS
// the color table is an array of 16-bit unsigned integers that specify an
// index into the currently realized logical palette
mBHead = (LPBITMAPINFOHEADER)new char[sizeof(BITMAPINFOHEADER) + (256 * sizeof(WORD))];
}
mBHead->biSize = sizeof(BITMAPINFOHEADER);
mBHead->biWidth = aWidth;
mBHead->biHeight = aHeight;
mBHead->biPlanes = 1;
mBHead->biBitCount = (unsigned short) aDepth;
mBHead->biBitCount = (WORD)aDepth;
mBHead->biCompression = BI_RGB;
mBHead->biSizeImage = 0; // not compressed, so we dont need this to be set
mBHead->biXPelsPerMeter = 0;
mBHead->biYPelsPerMeter = 0;
mBHead->biClrUsed = mNumPalleteColors;
mBHead->biClrImportant = mNumPalleteColors;
mBHead->biClrUsed = mNumPaletteColors;
mBHead->biClrImportant = mNumPaletteColors;
ComputeMetrics();
memset(mColorTable, 0, sizeof(RGBQUAD) * mNumPalleteColors);
// Compute the size of the image
mRowBytes = CalcBytesSpan(mBHead->biWidth);
mSizeImage = mRowBytes * mBHead->biHeight; // no compression
// Allocate the image bits
mImageBits = new unsigned char[mSizeImage];
// XXX We don't need to waste time initializing the bits. The reason Purify
// complains about UMR is because when asked to Draw() we ask GDI to render
// bits that aren't valid yet. We need to fix that...
#if 0
memset(mImageBits, 128, mSizeImage);
this->MakePalette();
#endif
if (256 == mNumPaletteColors) {
// Initialize the array of indexes into the logical palette
WORD* palIndx = (WORD*)(((LPBYTE)mBHead) + mBHead->biSize);
for (WORD index = 0; index < 256; index++) {
*palIndx++ = index;
}
}
// Allocate mask image bits if requested
if (aMaskRequirements != nsMaskRequirements_kNoMask)
{
if (nsMaskRequirements_kNeeds1Bit == aMaskRequirements)
@ -120,17 +153,18 @@ nsresult nsImageWin :: Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth,nsMa
mAlphaHeight = 0;
}
// XXX Let's only do this if we actually have a palette...
mColorMap = new nsColorMap;
if (mColorMap != nsnull)
{
mColorMap->NumColors = mNumPalleteColors;
mColorMap->Index = new PRUint8[3 * mNumPalleteColors];
mColorMap->NumColors = mNumPaletteColors;
mColorMap->Index = new PRUint8[3 * mNumPaletteColors];
// XXX Note: I added this because purify claims that we make a
// copy of the memory (which we do!). I'm not sure if this
// matters or not, but this shutup purify.
memset(mColorMap->Index, 0, sizeof(PRUint8) * (3 * mNumPalleteColors));
memset(mColorMap->Index, 0, sizeof(PRUint8) * (3 * mNumPaletteColors));
}
}
@ -142,18 +176,18 @@ nsresult nsImageWin :: Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth,nsMa
// set up the pallete to the passed in color array, RGB only in this array
void nsImageWin :: ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRect *aUpdateRect)
{
PRInt32 i;
PRUint8 *cpointer;
if (aFlags & nsImageUpdateFlags_kColorMapChanged)
{
// The entries for the color cube have been gamma corrected in the
// HPALETTE, so we don't need to worry about gamma correction here...
#if 0
PRUint8 *gamma = aContext->GetGammaTable();
if (mColorMap->NumColors > 0)
{
cpointer = mColorTable;
PRUint8* cpointer = mColorTable;
for(i = 0; i < mColorMap->NumColors; i++)
for(PRInt32 i = 0; i < mColorMap->NumColors; i++)
{
*cpointer++ = gamma[mColorMap->Index[(3 * i) + 2]];
*cpointer++ = gamma[mColorMap->Index[(3 * i) + 1]];
@ -161,13 +195,12 @@ void nsImageWin :: ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRe
*cpointer++ = 0;
}
}
this->MakePalette();
#endif
}
else if ((aFlags & nsImageUpdateFlags_kBitsChanged) &&
(nsnull != aUpdateRect))
{
if (mNumPalleteColors == 0)
if (0 == mNumPaletteColors)
{
PRInt32 x, y, span = CalcBytesSpan(mBHead->biWidth), idx;
PRUint8 *pixels = mImageBits +
@ -175,6 +208,9 @@ void nsImageWin :: ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRe
aUpdateRect->x * 3;
PRUint8 *gamma = aContext->GetGammaTable();
// Gamma correct the image.
// XXX We shouldn't waste time doing this unless the user requested
// gamma correction...
for (y = 0; y < aUpdateRect->height; y++)
{
for (x = 0, idx = 0; x < aUpdateRect->width; x++)
@ -196,18 +232,6 @@ void nsImageWin :: ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRe
//------------------------------------------------------------
PRUintn nsImageWin :: UsePalette(HDC* aHdc, PRBool bBackground)
{
if (mHPalette == nsnull)
return 0;
HPALETTE hOldPalette = ::SelectPalette(aHdc, mHPalette, (bBackground == PR_TRUE) ? TRUE : FALSE);
return ::RealizePalette(aHdc);
}
//------------------------------------------------------------
struct MONOBITMAPINFO {
BITMAPINFOHEADER bmiHeader;
RGBQUAD bmiColors[2];
@ -250,7 +274,7 @@ void nsImageWin :: CreateDDB(nsDrawingSurface aSurface)
if ((the_hdc != NULL) && (mSizeImage > 0))
{
mHBitmap = ::CreateDIBitmap(the_hdc, mBHead, CBM_INIT, mImageBits, (LPBITMAPINFO)mBHead,
DIB_RGB_COLORS);
256 == mNumPaletteColors ? DIB_PAL_COLORS : DIB_RGB_COLORS);
if (nsnull != mAlphaBits)
{
@ -298,7 +322,8 @@ PRBool nsImageWin :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurfa
::StretchDIBits(the_hdc, aDX, aDY, aDWidth, aDHeight,
aSX, aSY, aSWidth, aSHeight, mImageBits,
(LPBITMAPINFO)mBHead, DIB_RGB_COLORS, rop);
(LPBITMAPINFO)mBHead, 256 == mNumPaletteColors ? DIB_PAL_COLORS :
DIB_RGB_COLORS, rop);
}
else
{
@ -322,9 +347,14 @@ PRBool nsImageWin :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurfa
}
else
{
COLORREF oldTextColor = ::SetTextColor(the_hdc, RGB(0, 0, 0));
COLORREF oldBkColor = ::SetBkColor(the_hdc, RGB(255, 255, 255));
oldbits = ::SelectObject(srcdc, mAlphaHBitmap);
::StretchBlt(the_hdc, aDX, aDY, aDWidth, aDHeight, srcdc, aSX, aSY,
aSWidth, aSHeight, SRCAND);
::SetTextColor(the_hdc, oldTextColor);
::SetBkColor(the_hdc, oldBkColor);
::SelectObject(srcdc, mHBitmap);
::StretchBlt(the_hdc, aDX, aDY, aDWidth, aDHeight, srcdc, aSX, aSY,
aSWidth, aSHeight, SRCPAINT);
@ -370,7 +400,8 @@ PRBool nsImageWin :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurfa
::StretchDIBits(the_hdc, aX, aY, aWidth, aHeight,
0, 0, mBHead->biWidth, mBHead->biHeight, mImageBits,
(LPBITMAPINFO)mBHead, DIB_RGB_COLORS, rop);
(LPBITMAPINFO)mBHead, 256 == mNumPaletteColors ? DIB_PAL_COLORS :
DIB_RGB_COLORS, rop);
}
else
{
@ -821,145 +852,7 @@ PRUint32 quantlevel,tnum,num,shiftnum;
nsIImage*
nsImageWin::DuplicateImage()
{
PRInt32 num,i;
nsImageWin *theimage;
if( IsOptimized() )
return nsnull;
theimage = new nsImageWin();
NS_ADDREF(theimage);
// get the header and copy it
theimage->mBHead = (LPBITMAPINFOHEADER)new char[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * this->mNumPalleteColors];
num = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * this->mNumPalleteColors;
memcpy(theimage->mBHead,this->mBHead,num);
// set in compute metrics
theimage->mSizeImage = this->mSizeImage;
theimage->mRowBytes = this->mRowBytes;
theimage->mColorTable = (PRUint8 *)theimage->mBHead + sizeof(BITMAPINFOHEADER);
theimage->mNumBytesPixel = this->mNumBytesPixel;
theimage->mNumPalleteColors = this->mNumPalleteColors;
theimage->mAlphaDepth = this->mAlphaDepth;
theimage->mARowBytes = this->mARowBytes;
theimage->mAlphaWidth = this->mAlphaWidth;
theimage->mAlphaHeight = this->mAlphaHeight;
theimage->mLocation = this->mLocation;
theimage->mIsOptimized = this->mIsOptimized;
// set up the memory
num = sizeof(RGBQUAD) * mNumPalleteColors;
if(num>0)
memcpy(mColorTable,this->mColorTable,sizeof(RGBQUAD) * mNumPalleteColors);
// the bits of the image
if(theimage->mSizeImage>0)
{
theimage->mImageBits = new unsigned char[theimage->mSizeImage];
memcpy(theimage->mImageBits,this->mImageBits,theimage->mSizeImage);
}
else
theimage->mImageBits = nsnull;
// bits of the alpha mask
num = theimage->mARowBytes * theimage->mAlphaHeight;
if(num > 0)
{
theimage->mAlphaBits = new unsigned char[num];
memcpy(theimage->mAlphaBits,this->mAlphaBits,num);
}
else
theimage->mAlphaBits = nsnull;
theimage->mColorMap = new nsColorMap;
if (theimage->mColorMap != nsnull)
{
theimage->mColorMap->NumColors = theimage->mNumPalleteColors;
theimage->mColorMap->Index = new PRUint8[3 * theimage->mNumPalleteColors];
memset(theimage->mColorMap->Index, 0, sizeof(PRUint8) * (3 * theimage->mNumPalleteColors));
}
for(i = 0; i < theimage->mColorMap->NumColors; i++)
{
theimage->mColorMap->Index[(3 * i) + 2] = this->mColorMap->Index[(3 * i) + 2];
theimage->mColorMap->Index[(3 * i) + 1] = this->mColorMap->Index[(3 * i) + 1];
theimage->mColorMap->Index[(3 * i)] = this->mColorMap->Index[(3 * i)];
}
theimage->MakePalette();
theimage->mHBitmap = nsnull;
theimage->mAlphaHBitmap = nsnull;
return (theimage);
}
//------------------------------------------------------------
PRBool nsImageWin::MakePalette()
{
// makes a logical palette (mHPalette) from the DIB's color table
// this palette will be selected and realized prior to drawing the DIB
if (mNumPalleteColors == 0)
return PR_FALSE;
if (mHPalette != nsnull)
::DeleteObject(mHPalette);
LPLOGPALETTE pLogPal = (LPLOGPALETTE) new char[2 * sizeof(WORD) + mNumPalleteColors * sizeof(PALETTEENTRY)];
pLogPal->palVersion = 0x300;
pLogPal->palNumEntries = mNumPalleteColors;
LPRGBQUAD pDibQuad = (LPRGBQUAD) mColorTable;
for (int i = 0; i < mNumPalleteColors; i++)
{
pLogPal->palPalEntry[i].peRed = pDibQuad->rgbRed;
pLogPal->palPalEntry[i].peGreen = pDibQuad->rgbGreen;
pLogPal->palPalEntry[i].peBlue = pDibQuad->rgbBlue;
pLogPal->palPalEntry[i].peFlags = 0;
pDibQuad++;
}
mHPalette = ::CreatePalette(pLogPal);
delete pLogPal;
return PR_TRUE;
}
//------------------------------------------------------------
PRBool nsImageWin :: SetSystemPalette(HDC* aHdc)
{
PRInt32 nsyscol, npal, nument;
// if the DIB doesn't have a color table, we can use the system palette
if (mNumPalleteColors != 0)
return PR_FALSE;
if (!(::GetDeviceCaps(aHdc, RASTERCAPS) & RC_PALETTE))
return PR_FALSE;
nsyscol = ::GetDeviceCaps(aHdc, NUMCOLORS);
npal = ::GetDeviceCaps(aHdc, SIZEPALETTE);
nument = (npal == 0) ? nsyscol : npal;
LPLOGPALETTE pLogPal = (LPLOGPALETTE) new char[2 * sizeof(WORD) + nument * sizeof(PALETTEENTRY)];
pLogPal->palVersion = 0x300;
pLogPal->palNumEntries = nument;
::GetSystemPaletteEntries(aHdc, 0, nument, (LPPALETTEENTRY)((LPBYTE)pLogPal + 2 * sizeof(WORD)));
mHPalette = ::CreatePalette(pLogPal);
delete pLogPal;
return PR_TRUE;
return nsnull;
}
//------------------------------------------------------------
@ -967,7 +860,7 @@ PRBool nsImageWin :: SetSystemPalette(HDC* aHdc)
// creates an optimized bitmap, or HBITMAP
nsresult nsImageWin :: Optimize(nsIDeviceContext* aContext)
{
// Wait until we're asked to draw, before we create the DDB, because
// Wait until we're asked to draw before creating the DDB, because
// we don't have an HDC now
mIsOptimized = PR_TRUE;
return NS_OK;
@ -975,30 +868,6 @@ nsresult nsImageWin :: Optimize(nsIDeviceContext* aContext)
//------------------------------------------------------------
// figure out how big our palette needs to be
void nsImageWin :: ComputePaletteSize(PRIntn nBitCount)
{
switch (nBitCount)
{
case 8:
mNumPalleteColors = 256;
mNumBytesPixel = 1;
break;
case 24:
mNumPalleteColors = 0;
mNumBytesPixel = 3;
break;
default:
mNumPalleteColors = -1;
mNumBytesPixel = 0;
break;
}
}
//------------------------------------------------------------
PRInt32 nsImageWin :: CalcBytesSpan(PRUint32 aWidth)
{
PRInt32 spanbytes;
@ -1015,23 +884,6 @@ PRInt32 nsImageWin :: CalcBytesSpan(PRUint32 aWidth)
//------------------------------------------------------------
void nsImageWin :: ComputeMetrics()
{
mSizeImage = mBHead->biSizeImage;
if (mSizeImage == 0)
{
mRowBytes = CalcBytesSpan(mBHead->biWidth);
mSizeImage = mRowBytes * mBHead->biHeight; // no compression
}
// set the color table in the info header
mColorTable = (PRUint8 *)mBHead + sizeof(BITMAPINFOHEADER);
}
//------------------------------------------------------------
// clean up our memory
void nsImageWin :: CleanUp(PRBool aCleanUpAll)
{
@ -1061,9 +913,6 @@ void nsImageWin :: CleanUp(PRBool aCleanUpAll)
if (mAlphaBits != nsnull)
delete [] mAlphaBits;
if (mHPalette != nsnull)
::DeleteObject(mHPalette);
// Should be an ISupports, so we can release
if (mColorMap != nsnull)
{
@ -1072,11 +921,9 @@ void nsImageWin :: CleanUp(PRBool aCleanUpAll)
delete mColorMap;
}
mColorTable = nsnull;
mNumPalleteColors = -1;
mNumPaletteColors = -1;
mNumBytesPixel = 0;
mSizeImage = 0;
mHPalette = nsnull;
mImageBits = nsnull;
mAlphaBits = nsnull;
mColorMap = nsnull;

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@ -58,7 +58,7 @@ public:
* Return the header size of the Device Independent Bitmap(DIB).
* @return size of header in bytes
*/
PRIntn GetSizeHeader(){return sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * mNumPalleteColors;}
PRIntn GetSizeHeader(){return sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * mNumPaletteColors;}
/**
* Return the image size of the Device Independent Bitmap(DIB).
@ -66,29 +66,6 @@ public:
*/
PRIntn GetSizeImage(){ return mSizeImage; }
/**
* Make a palette for the DIB.
* @return true or false if the palette was created
*/
PRBool MakePalette();
/**
* Set the for this pixelmap to the system palette.
* @param aHdc is the DC to get the palette from to use
* @return true or false if the palette was set
*/
PRBool SetSystemPalette(HDC* aHdc);
/**
* Set the palette for an HDC.
* @param aHDC is the DC to set the palette to
* @param bBackround tells if the DC is in the background
* @return true or false if the palette was set
*/
PRUintn UsePalette(HDC* aHdc, PRBool bBackground = PR_FALSE);
/**
* Calculate the number of bytes spaned for this image for a given width
* @param aWidth is the width to calculate the number of bytes for
@ -194,30 +171,17 @@ private:
*/
void CleanUp(PRBool aCleanUpAll);
/**
* Calculate the amount of memory needed for the palette
* @param aBitCount is the number of bits per pixel
*/
void ComputePaletteSize(PRIntn aBitCount);
/**
* Calculate the amount of memory needed for the initialization of the pixelmap
*/
void ComputeMetrics();
void CreateDDB(nsDrawingSurface aSurface);
PRUint8 PaletteMatch(PRUint8 r, PRUint8 g, PRUint8 b);
PRInt8 mNumBytesPixel; // number of bytes per pixel
PRInt16 mNumPalleteColors; // either 8 or 0
PRInt16 mNumPaletteColors; // either 8 or 0
PRInt32 mSizeImage; // number of bytes
PRInt32 mRowBytes; // number of bytes per row
PRUint8 *mColorTable; // color table for the bitmap
PRUint8 *mImageBits; // starting address of DIB bits
PRUint8* mImageBits; // starting address of DIB bits
PRBool mIsOptimized; // Have we turned our DIB into a GDI?
nsColorMap *mColorMap; // Redundant with mColorTable, but necessary
nsColorMap* mColorMap; // Redundant with mColorTable, but necessary
// alpha layer members
PRUint8 *mAlphaBits; // alpha layer if we made one
@ -228,9 +192,6 @@ private:
nsPoint mLocation; // alpha mask location
PRInt8 mImageCache; // place to save off the old image for fast animation
PRInt16 mAlphaLevel; // an alpha level every pixel uses
// for Set/GetColorMap
HPALETTE mHPalette;
HBITMAP mHBitmap; // the GDI bitmaps
HBITMAP mAlphaHBitmap;
LPBITMAPINFOHEADER mBHead; // BITMAPINFOHEADER